This two-week season offers fascinating new views of postmodern ballet master, William Forsythe, at a variety of intriguing venues. Most conventionally, on the stage of Sadler's Wells, are performances of Decreation (Fri to 26 Apr), the last work Forsythe created for Frankfurt Ballet, which takes inspiration from an essay by the poet Anne Carson to explore the emotions of tenderness and rage. Also on the Wells stage is You Made Me A Monster (Mon, Tue), although here the audience are placed alongside the performers within an installation of strange skeletal structures. Meanwhile in galleries (including Tate Modern), theatre foyers and clubs are the season's art and performance installations. All devised by Forsythe, these range from the interactive film work City Of Abstracts, to Scattered Crowd (Midland Goods Shed, 1-3 May), created out of thousands of white balloons.